Play sound using MP3 Shield

Can MP3 shield play a sound just only when it reaches the threshold level of sound, such as 80dB? How it can be done?

Thank you :slight_smile:

Another input on the uC is used to sense the sound level input, and make a decision as to whether the MP3 shield is commanded to do something or not.

What is the threshold level of sound?
A dB number is meaningless without a reframe point. Do you mean dBm?